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1938
Blacksmith cranking forge, red hot iron in coals. Animation of molecules moving about. Kinetic Theory of matter illustrated. Slow down as temperature decreases. Rod heated.. Superimposed heat driving turbines, locomotives, automobiles.
13:38:06 Animated illustration of air forced up through coals from bottom & carbon & oxygen of air uniting to give off heat.
13:38:31 Large steam locomotive engine to stop. Animated overlay showing workings of steam engine w/ firebox, boiler & cylinder moving to power wheels making use of sliding valve to bring in hot steam.
13:40:17 Vanes of airwheel turned by air. Animation of steam turbine in cut-away showing multiple rotors.
13:41:36 Turbine seen in place in large electric generating plant.
13:41:53 Automobile sedan pulls up to service station gasoline pump. Attendant opens hood of six cylinder car. Animated cut-away of four-cycle motor showing carburetor, piston & crankshaft & cooling water.
13:43:43 Ext. of motor, hood covered & car leaves.
13:44:01 Tractor w/ diesel engine. Motor & cutaway showing working w/o carburetor or spark plug.
13:45:22 Tractor past & POV of plowing from back of tractor.
13:45:48 Title: First Law of Thermodynamic 1 Calorie of heat is 4.187 Joules of work.
13:46:03 Animation & title Second Law of Thermodynamics: Useful work can be done only when heat at high temperature is changed to heat at a lower temperature. The End.
#archivefootage #physics #educational
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8 дек 2012
